[Energy Efficiency Markets] Six different climate studies all point to the same conclusion: Energy efficiency is the cheapest way for the U.S. to reduce carbon dioxide emissions.

And some models show consumer costs actually falling as the nation ramps up energy efficiency to meet the Environmental Protection Agency’s Clean Power Plan.

Those are the findings in a new report by the Center for Climate and Energy Solutions, a non-profit policy organization. C2ES examined six studies that attempt to model the economics of the proposed federal rule…